<template>
    <div>
        <!-- 顶部滑动条区域 -->
        <div id="slider" class="mui-slider">
			<div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
				<div class="mui-scroll">
                    <a :class="['mui-control-item',item.id == 0? 'mui-active':'']" href="#item1mobile" data-wid="tab-top-subpage-1.html" v-for="item in cates" :key="item.id" @tap="getPhotoListByCateId(item.id)">
                        {{item.title}}
                    </a>
				</div>
			</div>
		</div>
        <!-- 图片列表区域 -->
        <ul class="photo-list">
            <router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo/'+item.id" tag="li">
                <img  v-lazy="item">
                <div class="info">
                     <h1 class="info-title">{{item.title}}</h1>
                    <div class="info-body">{{item.zhaiyao}}</div>                  
                </div>

            </router-link>
        </ul>
    </div>
</template>
<script>
//导入 mui 的js文件
import mui from '../../lib/mui/js/mui.min.js';

export default {
    data(){
        return {
            cates:[], //分类列表 
            list:[]   //图片列表
        }
    },
    created(){
        this.getAllCategory();
        //默认进入页面,就请求全部
        this.getPhotoListByCateId(0);
    },
    methods:{
        getAllCategory(){
            //获取所有的图片分类
            this.$http.get('api/getimgcategory').then(result=>{
                if(result.body.status === 0){
                    //手动拼接出一个最完整的分类列表
                    result.body.message.unshift({title:'全部',id:0});
                    this.cates = result.body.message;
                }
            })
        },
        getPhotoListByCateId(cateId){
            //根据 分类id 获取图片列表
            this.$http.get('api/getimages/'+ cateId).then(result=>{
                if(result.body.status === 0){
                    this.list = result.body.message;
                }
            });
        }
    },
    mounted(){
        //当组件中的DOM结构被渲染好并放到页面中后,会执行这个钩子函数
        //如果要操作元素,最好在mounted里面,因为,这个时候的DOM元素是最新的
        //初始化
        mui('.mui-scroll-wrapper').scroll({
            deceleration:0.0005
        });
    }
}
</script>
<style lang="scss" scoped>
*{
    touch-action: pan-y;
}


.photo-list{
    list-style:none;
    margin:0;
    padding: 0;
    padding-bottom: 0px;

    li {
        background-color: #ccc;
        text-align: center;
        margin-bottom: 10px;
        box-shadow: 0 0 6px #999;
        position: relative;
        img[lazy="loading"]{
            width: 40px;
            height: 300px;
            margin: auto;
        }

        img{
            width: 100%;
            vertical-align: middle;
        }
    }
}

.info{
    color: white;
    text-align: left;
    position: absolute;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.4);
    max-height: 84px;
    .info-title {
        font-size: 14px;
    }
    .info-body{
        font-size: 13px;
    }
}
</style>



